package com.mao.filter;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.mao.entity.SecurityUser;
import com.mao.entity.UserSecurity;
import com.mao.security.TokenManager;
import com.mao.utils.R;
import com.mao.utils.ResponseUtil;
import com.sun.org.apache.bcel.internal.generic.NEW;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;

public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {


    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;
    private AuthenticationManager authenticationManager;

    public TokenLoginFilter(TokenManager tokenManager, RedisTemplate redisTemplate, AuthenticationManager authenticationManager) {
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
        this.authenticationManager = authenticationManager;
        this.setPostOnly(false);
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/acl/login","POST"));
    }


    // 获取表单提交的用户名和密码
    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {

        // 获取表单提交对象
        try {
            UserSecurity user = new ObjectMapper().readValue(request.getInputStream(), UserSecurity.class);
            return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(user.getUsername(),user.getPassword(),new ArrayList<>()));
        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException();
        }
    }


    // 认证成功调用的方法
    @Override
    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {
       // 认证成功后得到的用户信息
        SecurityUser user = (SecurityUser) authResult.getPrincipal();

        // 根据用户名生成token
        String token = tokenManager.createToken(user.getUser().getUsername());

        // 将用户名称和权限 存入redis
        redisTemplate.opsForValue().set(user.getUser().getUsername(),user.getPermissionValueList());

        ResponseUtil.out(response, R.ok().data("token",token));

    }


    // 认证失败调用的方法
    @Override
    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
        ResponseUtil.out(response, R.error());
    }
}
